AUDI · SIMOS12.1 ECU · petrol

AUDI A3 SIMOS12.1 tuning files

Here is what the catalog holds for the AUDI A3 on the SIMOS12.1. Stock output across the matched variants spans 180–306 HP. Petrol calibration here is about crisp response and a result that holds up day to day. Each file is tied to the precise software on your car and checked before it goes out.

Upload your file →All A3 coverage

Available solutions

Solutions that apply to the SIMOS12.1 on this petrol platform. The exact set depends on the specific engine and software version.

Stage 1 Stage 2 Swirl Flaps OffLambda / O2OPF/GPF Off

Engine variants & ECU software

14 distinct variants for the AUDI A3 on the SIMOS12.1 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 2000 306HP
Engine code: CJSA
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 306 HP
ECU SW: 10273592AA
ECU HW: CASC1CC5.DAT
Calibration: 8V0906259_0006

Variant 2

ECU

Catalog engine: 2000 280HP
Generation: 4L Mk1 2006-2010
Matched gains engine: 3.6 FSI 280
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 280 HP
Stage 1 power: 300 HP
Power increase: +20 HP (+7%)
Stock torque: 360 Nm
Stage 1 torque: 380 Nm
Torque increase: +20 Nm (+6%)
SW upgrade: 8V0906259_0002
Calibration: 8V0906259_0002

Variant 3

ECU

Catalog engine: 2000 280HP
Generation: 4L Mk1 2006-2010
Matched gains engine: 3.6 FSI 280
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 280 HP
Stage 1 power: 300 HP
Power increase: +20 HP (+7%)
Stock torque: 360 Nm
Stage 1 torque: 380 Nm
Torque increase: +20 Nm (+6%)
ECU SW: X245
ECU HW: 8V0906259
SW upgrade: 8V0906259_X245
Calibration: 8V0906259_X245

Variant 4

ECU

Catalog engine: 1800 16v 180HP
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
SW upgrade: 8V0906264_0008
Calibration: 8V0906264_0008

Variant 5

ECU

Catalog engine: 1800 16v 180HP
Engine code: CJSA
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
ECU SW: 10273609AA
ECU HW: CASC1CC5.DAT
Calibration: 8V0906264_0007

Variant 6

ECU

Catalog engine: 1800 16v 180HP
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
SW upgrade: 8V0906264B_0003
Calibration: 8V0906264B_0003

Variant 7

ECU

Catalog engine: 1800 16v 180HP
Engine code: CJSA
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
ECU SW: 10273623AA
ECU HW: CASC1CC5.DAT
Calibration: 8V0906264C_0002

Variant 8

ECU

Catalog engine: 1800 16v 180HP
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
ECU SW: 0003
ECU HW: 8V0906264C
SW upgrade: 8V0906264C_0003
Calibration: 8V0906264C_0003

Variant 9

ECU

Catalog engine: 1800 16v 180HP
Engine code: CJSA
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
SW upgrade: 8V0906259_0007
Calibration: 8V0906259_0007

Variant 10

ECU

Catalog engine: 1800 16v 180HP
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
SW upgrade: 8V0906264C_0006
Calibration: 8V0906264C_0006

Variant 11

ECU

Catalog engine: 1800 180HP
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
ECU SW: 0001
ECU HW: 8V0906264
SW upgrade: 8V0906264_0001
Calibration: 8V0906264_0001

Variant 12

ECU

Catalog engine: 1800 180HP
Engine code: CJSA
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
ECU SW: 10231217AA
ECU HW: CASC1C25.DAT
Calibration: 8V0906264_0002

Variant 13

ECU

Catalog engine: 1800 180HP
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
SW upgrade: 8V0906264B_0002
Calibration: 8V0906264B_0002

Variant 14

ECU

Catalog engine: 1800 180HP
Controller brand: SIEMENS
ECU: SIMOS12.1
Stock power: 180 HP
ECU SW: 0006
ECU HW: 8V0906264
SW upgrade: 8V0906264_0006
Calibration: 8V0906264_0006

Related vehicles

Other vehicles built on the SIMOS12.1 controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the AUDI A3 on the SIMOS12.1?

Stage 1, Stage 2, Swirl Flaps Off, Lambda / O2, OPF/GPF Off. The exact set depends on the specific engine and software version.

Do you cover the SIMOS12.1 ECU software on this model?

Yes — the AUDI A3 on the SIMOS12.1 ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.

How is the file delivered?

Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.